Circuit-breaker.



c-.-A TUCKER.

4 l. CIRCUH BREAKER. l APPLICATIQ'N FILED DEC. 29. 1909.

Patented Aug. 31'; 1915.

' AT'TORNEY' C. A. TUCKER. CIRCUIT BREAKER. APFucATloN mso Dic. 29, 190e.

Patented Aug. `31, 1915.

3 SHEETS-SHEET 2.

ATTORNEY C. A. TUCKER.

CIRCUIT BREAKER. APrucATloM FILED pEc.29. |909.

'PatlltedAl1g. 31, 1915.

s SHEETS-SHEET 3 IIIILIILI L' wnNEssEs: l

INVENTOR ATTONEY lvented a new and use i www @willig ,HOUSE ELECTRIIIC NB MANUFAUTURING- GGMEANY, .a3

SYLVANIA.

Specication of Lett-ers :Pr-item.

CORPORATIN @E PENE?- emoUi'ii-eaaamm.

Appleaoii flef December 29, 1909. Serial No. 535,437.

o all 'whom it may conca/fn Be it known 'that I, CURTIS A. Tommie a citizen of the United Sfates, and a resident of Edgewood Park, he county of Aile- My invention i'elatesto electric circuit` switching devices and particularly to such automatic circuit interi-epilees as adapted forwfery large-current service.

'One of bhe objects of my im'eiition is io vm'ovrle a 'device of the IClaes 'above indicated that shall be simple and eompac in construction ami which, at the same time, may

` usual toggle mechanism. lie at' lengt-li will close the breaker, .e

lfor the main and aiixilt rv Contact be closed manually with a relatively sighi exertion and be capable of transmitting severai thousand amperee Another objec'i of my vider an improved and eective means for. insuring 'that the main and auxiliary coo act members become engaged and separated in a'predeterniiiei sequence. iia he imei7N able conact members are Well remo-Voi fiom theirv copei'ating Stationary membeis pif-ici eo the iinal inteiaiogion of the 'sii-voit ai; lieeiixil ary arciiig eimiiiala wieso for silientlj,`A L ying the iiiovecioni: oiE ehe main cosiiiaci. bearing to iiee f x supporting ami c'i' maniaio.. auxiliary arcilla; minais onder in. their ciose )f:-ei".: i.

The movable cnac' ii'aeiifiee of circuit breakers deeigne' foi* iagecimrei'u service less the operating lever is made ver? long and the parte of *bhe mechaioism ifeiv Accoi'clmg *to my' piesoii inve 1eme. i cmoloy a cam mechanism in aai i on lie emeiii oi "eil ioioo parte being Such that a ielaii'veiy exerted on an opera-mg le which are ecce'nricailf/ retail?? 'aim ^o. upon the frame am., are iiiechanicaiijv aes@- cietecl for cooperative ooeiaioa 'iij e, motion r'esiient connece i.,

mation is to pio Referring to the drawings, the, cicuit iiitei'ruptei: here shown comprises stationary conact members and 2 which are mounteil on a slaboz' L'base 3 of insulating material.y a movable Contact member .lich is aclaplted to bridge the Stationai'y Contact members when the breaker is closed, an operating Iievei' 5 and an operating mechanism 6.

The stationary Contact member l is 'pio vided willi auxiliary Contact members '7,

.preferably of carbon, which are .supported lov a b acket 8 and aapteei io take the formeel when 'the ciiciii is iiiteriupecl. The movable coni L member comprises a. plriialiey o'i iaiiii'f-aewcoiiact members 'aseeiiilziefl eide lof; e am? ataoliei "to series'o brackets la Wife/ii are piifoialij* .roo-'mimi on foei or' sliaf'; l

The ope i'tiiigf nice.' Y' 1F- of dupiicate carrie lo we. ally soppoieo n short rode ,oe pins "i elif-i' aioiect inwai'oly n Hoe me o usual saiioiiaryy l'if'oiii'e securelio "'li slab o; base 3, a pf- 'of coi've lef'eel which are each pivot-ally soppoiteci uoon elle ends of a shaft'. i4 and aii'e 'each pivotaliy coiinececl io one eiiiemi'y'. of one of the cams l0: contac'y hearing member i5. 'which lv :moiiiited on a staiionaiy shaft ,ia umg "handle 5 LLA. e i a rod. loi'lahaf iS on which foaiy 'connected 'o the israel@ ich ie seiiiients of ik Sonia@ a alie eecmreui, i i

act bearingmember 'l5 is Springs are mounted on guide pins 21 and are disposed between the lower ends f the levers 19 and ledges 22 on the member 15 to which they are secured at one end. s The arrangement of parts is such'that the springs tend to force the lower ends of the levers 19 outwardly and thereby throw the contact members inwardly and form, by reason of their resiliency, a set of yielding connections which maintain excellent contact'between the sections of the movable contact members 4 and the stationary members 1 and 2. A bracket 23 depends from the contactbearing member 15 and is provided with a release magnet 24 which is adapted to rotate a latch 25 in opposition to a spring 26 and to trip the circuit breaker in the usual manat its outer endto engage a roller 27 located on a shaft which connects the outer ends of the cams 10.

A bifurcated auxiliary contact-bearing member 28 is pivotally supported from the,

25 brackets 12 by pins 29 and is provided with arcing contact blocks 30 which cooperate with the members 7. The pins 29 and the shaft 16 are disposed substantially one above the other. The members 7 and 30 are forced 5 into engagement with each other by means of coil compression springs 31 nrounted on slidably and pivotally mounted guide pins 32 and disposed between intermediate points 33 in the arms of the member 28, to which 4 35 the pins 32 are fulcrumed and pivotally connected, and the upperends of the contacty bearing member 15 with which the outer ends of the pins vhave sliding and pivotal connections.

The operation of the device is as follows: Assuming that the parts occupy the positions shown in Fig. 1 of the drawings, if the release magnet 24 is energized, a hammer rod ,54 strikes one end of the latch 25 and withdraws the outer end of the latch from the roller 27. The resiliency of the movable contact members 4 and the compressed springs 20 and 31 are sufficient to initially separate the contact members as soon as' the latch is released, and the weight of the parts will then throw the breaker to its open position, as illustrated in Fig. 2. y 1f it is desired to close the interrupter, assuming that the parts occupy positions shown in Fig. 2, downward pressure isfapplied to the ever 5 which rotates about the shaft 16 as an axis. The rollers 17 travel 'along the surfaces of the cams 10 which cause them'to rotate about the pins 11. This e0 action rotates the levers 13 Iabout the shaft 14 as an axis and decreases" he distance of separation between the shafts 11 and 14. f Since the member 15 is pivoted upon the stationary shaft 16 as an axis and since the le shaft-11 is stationary, the shaft 14.must' which tend to rotate it in a counter-c ner. The latch 25 is provided with a lock approach the shaft 11, and, consequently, the ymember 15 must rotate in a counterclockwise direction and thus throw the contactmembers 4 into engagement with the stationarv contact members 1 and 2.

` The pivotalsupports and fulcrum points of the contact supporting member 15 land the auxiliary contact-bearing lever 28 are so piaced and the resilient lost-motion connection between them is4 so constructed that the arcing contact members '7 and 30 come into engagement with each other before the primary contact members comeinto enga ment and, therefore, they are separate ast in opening the breaker and no arcs are established between the main contact members. l The lever 5 is provided with springs 36 ockwise` direction and hold it in the position shown in Fig. 1 when the breaker is closed.

The form and structure of the circuit breakermav 'obviously be modified within thescope of my invention, and I desire that only such limitations shall be imposed Aas are indicated in the appended claims.

I claim as my invention:

1. In a circuit interrupter, the combination with stationary and movable contact members and an operating lever, of an operatin mechanisminterpo'sedbetween the operating lever and the movable contact member, said mechanism comprising a pivtally supported contact-bearing member, a link a'nd lever ,connection between an intermediate point therein and a stationary pivot for the lever, the lever having Va cam surface, and a roller secured to an intermediate point v in the operating lever .to coperate with the surface of said cam. j

2. In a circuit interrupter, the combinationI with stationary and movable contact members and an operating lever having two parallel arms joined near their outer ends, of an operating mechanism for connecting the operating lever to the movable contact n! member comprising a. pairof'relatively stationary shafts, a contact-bearing member pivotally `mounted on .one of said shafts and connected to vthe other by a toggle joint connection consisting of interposed links and cams pivotally supported uponfthe other stationary shaft, and rollers secured to intermediate points in the operating lever arms toengagethe surfaces of the ca sa'id 'operating lever arms being'fulcrum on said first-named stationary shaft and the movable contact member being yieldingly supported on said contact-bearing member.

3. A circuit interrupter comprising stationary contact members, la movable contactbearing member, alever pivoted at an intermediate point and formed into a cam-at one end, an interposed link between the4 opposite end of the lever and the` contact-bearing lmember, a latch adapted to engage the end u? terru ter.

tionary and movable contact members, a. movable contact-bearing member, a lever' pvoted atan intermediate point' and formed into a. cam at one end, an interposed linkY between'y the opposite end of the lever and the contact-bearing member, a latch pivotally supported on the contact-bearing member and adapted to engage the end of the cam when the interrupter is closed, and an operating lever provided with a roller for engaging the cam surface in closing the in .5. n a circuit interrupter, the combination with. stationary and movable contact membersen'd an operating lever therefor, of ank .operating mechanism for connecting the operating. lever to the movable contact members comprising a pivotally mounted contact-bearing member, a plurality of pivotally mounted cam members, links for connecting said cam members to said contactbearing member, a plurality of levers pivotally mounted upon said contact-bearing member and operatively connected to the' said movable contact members, 'resilient Y means interposed between saidcontact-beariifg member and' said levers :foryieldingly supporting said movable contact members,

and rollers secured to said operating lever i to engage the surface of the said cams.

In testimony whereof, I have "hereunto subscribed my name this 23rd day of Dec., 1909.

, CURTIS A. TUCKER.

Witnesses:

EDWARD S.l KING, B. B. HINES. 

